<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 简单的
        // console.log(1);
        // setTimeout(()=>{
        //     console.log(2);
        // },1000)
        // console.log(3);//执行顺序 1，3，2

        //复制的
        console.log(1);
        setTimeout(()=>{
            console.log(2);
        },1000)
        console.log(3);
        new Promise((resolve, reject) => {
            resolve()
            console.log(4);
        }).then((res) => {
            console.log(5);
        })
        console.log(6);//执行循序1，3，4，6，5，2

    </script>
</body>
</html>